Suggest Medication For Depression

My 87 year old father has been spending, at a minimum, 16-18 hours a day in bed. He is in good physical health and has recently been diagnosed with major depression. He is currently taking the following medications:lexapro-10mg.,remeron-15 mg.,tramadol-50mg.,norvasc-10mg., enalpril-10mg.,simvastatin-20mg., flomas-0.4mg., aricept-30mg., lisinopril-20 mg., and some over the counter vitamin supplements. He has been on some type of anti-depressant since the middle of December. He has been in an assisted-living situation for about 4 months. This was his choice to move into this facility. He doesn t watch television or participate in any activities. If he does participate in some activities he has to be coaxed or strongly encouraged to go. I have a psychiatric nurse visiting him once a week and he has an appointment with a psychiatrist scheduled in April. Should I be overly concerned about this behavior? Do you have any suggestions as to questions I should bring to the psychiatrist s attention?